BroadcastStateMachine: Treat ConnectedProcessing as connected

Connectedprocessing should be treated as connected state. If
ConnectedProcessing is not treating as Connected it may implies in some
invalid cases e.g. Can't remove sources of connected devices.

Tag: Bug
Bug: 315389180
Bug: 316005152
Test: atest BassClientStateMachineTest
Change-Id: I5195374402b7904cc86a85625d934e1cac74e0e4